fix: Replace C-style casts with C++ casts

This commit addresses cppcheck warnings about C-style casts (cstyleCast)
by replacing them with appropriate C++ casts. C-style casts are considered
dangerous because they can perform unsafe conversions without compile-time
type checking, while C++ casts are more explicit and type-safe.

Changes made:
- static_cast for safe type conversions (e.g., void* to struct*)
- reinterpret_cast for pointer type conversions (e.g., uint8_t* to char*)
- Combined static_cast and reinterpret_cast for integer-to-pointer conversions

Fixed files:
- kmscube/cube-gles2.cpp: GLvoid* casts for OpenGL vertex attribute pointers
- kmscube/cube-wl.cpp: Wayland interface pointer casts
- kmscube/cube-x11.cpp: X11 window handle conversion
- utils/fbtest.cpp: mmap return value cast
- utils/kmstest.cpp: Framebuffer pointer arithmetic
- utils/kmsview.cpp: Framebuffer memory mapping cast

1 files changed, 1 insertions, 1 deletions

diff --git a/utils/kmstest.cpp b/utils/kmstest.cpp
index 8340fa7..c6efb45 100644
--- a/utils/kmstest.cpp
+++ b/utils/kmstest.cpp
@@ -748,7 +748,7 @@ static string fb_crc(IFramebuffer* fb)
 
 	for (unsigned y = 0; y < fb->height(); ++y) {
 		for (unsigned x = 0; x < fb->width(); ++x) {
-			uint32_t* p32 = (uint32_t*)(p + fb->stride(0) * y + x * 4);
+			uint32_t* p32 = reinterpret_cast<uint32_t*>(p + fb->stride(0) * y + x * 4);
 			RGB rgb(*p32);
 
 			r = crc16(r, rgb.r);